First, check out Claw of the Conciliator, which has a series of great posts on science-fiction and fantasy from a Christian perspective (listed in the right hand column of the blog).
Then head over to A Christian Worldview of Fiction and jump in to a discussion about Fantasy & a Christian Worldview (now up to something like Part 23 or 24—but the parts are short and easily digested). Nods to Mir at Mirathon, who also points to this exchange from her blog.
All three of these blogs also provide good links and/or blogrolls on the same subject. Another community of bloggers I didn’t know was out there. Cheers, y’all!